<script src='@routes.Assets.at("javascripts/form_validation/carpool/join_validation.js")' type="text/javascript"></script>
<form action="@routes.GroupActions.joinGroup()" method="post" id="join_group_form">
    <input name="group_id" type="text" placeholder="Group id">
    <input type="submit" value="Join Carpool group" data-icon="check" data-iconpos="right">
</form>